Search Publications
New observations of the extended hydrogen exosphere of the extrasolar planet HD 209458b
Ehrenreich, D.; Ferlet, R.; Vidal-Madjar, A. +6 more
Context: Atomic hydrogen escaping from the planet
High Metallicity of the X-Ray Gas Up to the Virial Radius of a Binary Cluster of Galaxies: Evidence of Galactic Superwinds at High-Redshift
Reiprich, Thomas H.; Hayashida, Kiyoshi; Matsumoto, Hironori +4 more
We present an analysis of a Suzaku observation of the link region between the galaxy clusters A 399 and A 401. We obtained the metallicity of the intracluster medium (ICM) up to the cluster virial radii for the first time. We determined the metallicity where the virial radii of the two clusters cross each other (∼2 Mpc away from their centers) and…
Water vapour jets inside the plume of gas leaving Enceladus
Hansen, C. J.; Hendrix, A. R.; Colwell, J. E. +7 more
A plume of water vapour escapes from fissures crossing the south polar region of the Saturnian moon Enceladus. Tidal deformation of a thin surface crust above an internal ocean could result in tensile and compressive stresses that would affect the width of the fissures; therefore, the quantity of water vapour released at different locations in Enc…
Hinode, TRACE, SOHO, and Ground-based Observations of a Quiescent Prominence
Heinzel, P.; Anzer, U.; Golub, L. +10 more
A quiescent prominence was observed by several instruments on 2007 April 25. The temporal evolution was recorded in Hα by the Hinode SOT, in X-rays by the Hinode XRT, and in the 195 Å channel by TRACE. Moreover, ground-based observatories (GBOs) provided calibrated Hα intensities. Simultaneous extreme-UV (EUV) data were also taken by the Hinode EI…
Suzaku Results on Cygnus X-1 in the Low/Hard State
Done, Chris; Dotani, Tadayasu; Yamaoka, Kazutaka +9 more
The black-hole binary Cygnus X-1 was observed for 17ks with the Suzaku X-ray observatory in 2005 October, while it was in a low/hard state with a 0.7-300keV luminosity of 4.6×1037ergs-1. The XIS and HXD spectra, spanning 0.7--400keV, were reproduced successfully, incorporating a cool accretion disk and a hot Comptonizing coro…
TiO and VO broad band absorption features in the optical spectrum of the atmosphere of the hot-Jupiter HD 209458b
Ehrenreich, D.; Ferlet, R.; Vidal-Madjar, A. +4 more
Aims: The presence of titanium oxide (TiO) and vanadium oxide (VO) gas phase species is searched for in the atmosphere of the hot Jupiter
Methods: We compared a model for the planet's transmitted spectrum to multi-wavelength eclipse-depth measurements (from 3000 to 10 000 Å) using archived HST-STIS time series sp…
a SUBARU Archival Search for Faint Trans-Neptunian Objects
Fuentes, Cesar I.; Holman, Matthew J.
We present the results of a survey for trans-Neptunian objects (TNOs) based on Subaru archival images, originally collected by Sheppard et al. in 2005 as part of a search for irregular satellites of Uranus. The survey region covers 2.8 deg2, centered on Uranus and observed near opposition on two adjacent nights. Our survey reaches half …
A Population of Massive and Evolved Galaxies at z gtrsim 5
Panagia, N.; Dickinson, M.; Ferguson, H. C. +4 more
We report results from a search for massive and evolved galaxies at z gtrsim 5 in the GOODS southern field. Combining HST ACS, VLT ISAAC, and Spitzer IRAC broadband photometric data, we develop a color selection technique to identify candidates for being evolved galaxies at high redshifts. The color selection is primarily based on locating the Bal…
Spitzer IRS Spectra and Envelope Models of Class I Protostars in Taurus
Watson, D. M.; Furlan, E.; Sargent, B. +8 more
We present Spitzer Infrared Spectrograph (IRS) spectra of 28 Class I protostars in the Taurus star-forming region. The 5-36 µm spectra reveal excess emission from the inner regions of the envelope and accretion disk surrounding these predecessors of low-mass stars, as well as absorption features due to silicates and ices. Together with short…
Strong lensing in Abell 1703: constraints on the slope of the inner dark matter distribution
Kneib, J. -P.; Pelló, R.; Egami, E. +9 more
Properties of dark matter haloes can be probed observationally and numerically, and comparing both approaches provides ways to constrain cosmological models. When it comes to the inner part of galaxy cluster scale haloes, interaction between the baryonic and the dark matter component is an important issue that is far from being fully understood. W…